Troubleshooting Guide - Lowara TKS serie Installations- Und Bedienungsanleitungen

8.2 Troubleshooting Guide

PROBLEM
The electric pump does not start
Main switch on
Green light off
The electric pump does not start or
it stops if it is already running
The main switch is on
Green light on
Red light on (*** flashes)
Users closed
Electric pump running with
speed increasing and
decreasing cyclically
Green light on
Yellow light on
Red light off
Users open
The electric pump does not start
Green light on
Yellow light off
Red light off
The electric pump is running.
There are vibrations in the pump
or near the pump
Frequent starts and stops
The electric pump is running
always at maximum speed
PROBABLE CAUSE
No power supply
Triggering of magneto-thermal
switch
*** = 2 flashes
Motor overload
Damaged motor stator
*** = 3 flashes
Converter overtemperature
*** = 4 flashes
Motor overtemperature (if the
terminal board is equipped with
the PTC protection)
*** = 5 flashes
Triggering of dry running
*** = 6 flashes
Problems with the pressure
transmitter
*** = 7 flashes
The supply voltage is too low
Water leaks through the non-return
valve or in the system
Undersized surge tank
Ruptured surge tank diaphragm
Setting of work point not suitable
for the system (the value is higher
than the pressure that the pump
is able to deliver)
Setting of work point not suitable
for the system (the value is equal
to zero)
Setting of work point not suitable
for the system (the value is lower
than the minimum pressure
that the pump can deliver)
There may be problems with the
float switch in the suction tank
There may be problems with the
pressure transmitter
POSSIBLE REMEDY
Restore the power supply
Reset the switch
Check the working conditions
of the electric pump
Check the motor
Check to see if anything is
preventing the proper cooling
of the converter
Check the working conditions
of the electric pump
Check the water level
Check the external device and
the related connection cables
Check the transmitter and
the related connection cable
Check the system in order to
locate the leaks.Repair or replace
any faulty components.
Check the working conditions
of the electric pump
Replace the diaphragm
Modify the system settings
Modify the system settings
Modify the system settings
Check the float switch and the
tank
Check the hydraulic connection
between the transmitter and the
system
en
29